Description Usage Arguments Details Value References Examples
pick median method
1 | pickMedian(env.stack, subset = NULL, stack = FALSE)
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env.stack |
a |
subset |
subset is a string |
stack |
stack is an option that if you want not compose them togethor (result return as a |
This method mainly implement pick median method
rasterLayer
or rasterStack
if stack is set to TRUE
Lobo, J. M., & Tognelli, M. F. (2011). Exploring the effects of quantity and location of pseudo-absences and sampling biases on the performance of distribution models with limited point occurrence data. Journal for Nature Conservation, 19(1), 1-7.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | # load the sdmvspecies library
library("sdmvspecies")
library("raster")
# find package's location
package.dir <- system.file(package="sdmvspecies")
# let see where is our sdmvspecies is installed in
package.dir
# find env dir under the package's location
env.dir <- paste(package.dir, "/external/env/", sep="")
# let see env dir
env.dir
# get the environment raster file
files <- list.files(path=env.dir, pattern="*.bil$", full.names=TRUE)
# make raster stack
env.stack <- stack(files)
# run pick mean
species.raster <- pickMedian(env.stack)
# plot map
plot(species.raster)
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